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The lightest new gauge boson BH with mass of hundreds GeV is predicted in the littlest Higgs model. BH should be accessible in the planned ILC and the observation of such particle can strongly support the littlest Higgs model. The realization of γγ and e-γ collisions would open a wider window to probe BH. Inthis paper, we study the new gauge boson BH production processes e-γ→ e-γBH and e-γ→e-ZBH at the ILC. Our results show that the production cross section of the process e-γ→ e-ZBH is less than 0.1 fb in most parameter spaces allowed by the electroweak precision data while the cross section of the process e-γ→ e-γBH can be over one fb in the favorable parameter spaces. With the high luminosity, the enough typical signals could be produced via e-γ→ e-γBH. Because the final electron and photon beams can be easily identified and the signal can be easily distinguished from the backgrounds produced by Z and H decaying, e-γ→e-γBH is a promising process to probe BH.